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United States Patent |
6,251,049
|
Milton
|
June 26, 2001
|
Elastic swimming exercise device
Abstract
A device for maintaining a relatively fixed position of a person exercising
in a pool. The device uses a flexible rod which deforms elastically as the
swimmer exercises. In this fashion, the swimmer is given feedback as to
how strenuously he or she is exercising. The device can be anchored to a
conventional pool ladder. In addition, for those pools without a ladder, a
separate anchor frame is disclosed. The anchor frame allows the device to
be used in virtually any pool. It also allows the device to be used on a
dock or on a boat.
Inventors:
|
Milton; Curtis A. (4429 Widgeon Way, Tallahassee, FL 32303)
|
Appl. No.:
|
523710 |
Filed:
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March 13, 2000 |
Current U.S. Class: |
482/55; 434/254; 482/56 |
Intern'l Class: |
A63B 023/02 |
Field of Search: |
482/111,124,105,55,74,56,148
434/254
|
References Cited
U.S. Patent Documents
5344373 | Sep., 1994 | Greene | 482/55.
|
5846167 | Dec., 1998 | Liu et al. | 482/55.
|
5951443 | Sep., 1999 | Askins | 482/74.
|
Primary Examiner: Richman; Glenn E.
Attorney, Agent or Firm: Horton; John Wiley
Claims
Having described my invention, I claim:
1. A swimming exercise apparatus intended to maintain a swimmer relatively
stationary in a pool by linking said swimmer to the upright legs of a
ladder on the side of said pool, comprising:
a. a belt harness attached to said swimmer around said swimmer's waist;
b. a flex bow, having a first end and a second end, and being placed
between said upright legs of said ladder and said side of said pool;
c. a first flexible line, having a first end and a second end, wherein said
first end is attached to said first end of said flex bow and said second
end is attached to said belt harness; and
d. a second flexible line, having a first end and a second end, wherein
said first end is attached to said second end of said flex bow and said
second end is attached to said belt harness, so that as said swimmer
attempts to swim away from said ladder said first and second flexible
lines are placed in tension, said flex bow is drawn against said upright
legs, and said flex bow begins to bow.
2. The device as recited in claim 1, wherein said flex bow is a long
slender rod, capable of bending substantially without undergoing plastic
deformation.
3. The device as recited in claim 1, wherein said belt harness further
comprises:
a. a collector ring, joining said second end of said first flexible line
together with said second end of said second flexible line;
b. a harness union;
c. a harness leader, removably connecting said harness union to said
collector ring;
d. a belt, adjustably attached to the waist of said swimmer; and
e. detachable and adjustable means for connecting said belt to said harness
union.
4. A swimming exercise apparatus intended to maintain a swimmer relatively
stationary in a pool by linking said swimmer to the side of said pool,
comprising:
a. a belt harness attached to said swimmer around said swimmer's waist;
b. an anchor frame, having at least one anchor leg descending into said
pool adjacent said side of said pool and at least one anchor runner
running along said apron of said pool so as to frictionally hold said
anchor frame in place;
c. a flex bow, having a first end and a second end, and being placed
between said anchor leg of said anchor frame and said side of said pool;
d. a first flexible line, having a first end and a second end, wherein said
first end is attached to said first end of said flex bow and said second
end is attached to said belt harness; and
e. a second flexible line, having a first end and a second end, wherein
said first end is attached to said second end of said flex bow and said
second end is attached to said belt harness, so that as said swimmer
attempts to swim away from said anchor frame and said first and second
flexible lines are placed in tension, said flex bow is drawn against said
anchor leg and said flex bow begins to bow.
5. The device as recited in claim 4, wherein said flex bow is a long
slender rod, capable of bending substantially without undergoing plastic
deformation.
6. The device as recited in claim 4, wherein said belt harness further
comprises:
a. a collector ring, joining said second end of said first flexible line
together with said second end of said second flexible line;
b. a harness union;
c. a harness leader, removably connecting said harness union to said
collector ring;
d. a belt, adjustably attached to the waist of said swimmer; and
e. detachable and adjustable means for connecting said belt to said harness
union.
Description
BACKGROUND--FIELD OF INVENTION
This invention relates to the field of swimming exercise devices. More
specifically, the invention comprises a restraining harness which allows
the user to perform swimming strokes in a pool without moving
significantly.
BACKGROUND--DESCRIPTION OF PRIOR ART
Swimming restraint harnesses have been in use for some time. U.S. Pat. No.
3,988,020 to Carter (1976) discloses a belt harness intended to be
anchored to the side of a pool. The harness has two inelastic cords
attached to fixed anchor points. These anchor points must be drilled into
the concrete near the edge of the pool. While effective in restraining the
swimmer, the Carter device does require disfiguring the pool by installing
two permanent anchor points. In addition, the harness assembly is
substantially rigid. With a substantially rigid harness, it is difficult
for the swimmer to know how much energy he or she is exerting. A
preferable arrangement is to have an elastic member in the harness, so
that as the swimmer strokes more vigorously, some forward progress is
noted.
An elastic harness is disclosed in U.S. Pat. No. 4,109,905 to Meier (1978).
The Meier device has a short elastic section near the anchor point which
does allow some stretching of the harness. Unfortunately, however, the
Meier device also requires a fixed anchor point. Additionally, the harness
disclosed is rudimentary and impractical.
A more sophisticated harness is disclosed in U.S. Pat. No. 5,236,404 to
MacLennan (1993). The MacLennan device uses a vest type life jacket as a
harness, thereby distributing the load on the swimmer's body in a
different fashion. The MacLennan invention also provides for attaching the
harness to a pool ladder, eliminating the need for dedicated anchor
points. The MacLennan device does not, however, have any elastic members
in the harness. An additional drawback is that many pools do not have
ladders, making it impossible to attach the device. Finally, the use of a
vest type life jacket as a harness significantly restricts many swimming
strokes.
U.S. Pat. No. 5,601,514 to Horn (1997) addresses the attachment problem
with suction cups. This device uses two large suction cups on a
substantially rigid plastic frame. The device is intended to work in
compression though; i.e., the swimmer is trying to force his way toward
the attachment point. This approach would not work if the swimmer swims in
the other more conventional direction.
Finally, U.S. Pat. No. 5,816,982 to Croushmore (1998) discloses a radical
approach to the anchoring problem. The Croushmore device discloses a
collapsible bag used as an anchor. The swimmer fills the bag with water
and then drags it up on the side of the pool. The bag anchors a mesh to
which is attached the swimming harness. Of course, a swimmer can exert
considerable force while exercising. Thus, the bag will need to be quite
heavy in order to be an effective anchor. This fact means that the user
will have to fill the bag with many pounds of water, making it quite
difficult to drag up and over the side of the pool.
The known devices for restraining a swimmer while exercising are therefore
limited in that they:
1. Do not provide sufficient elastic extension of the harness in order to
allow the swimmer to gauge his or her level of exertion,
2. Require the placement of permanent anchor points in the pool;
3. Require the presence of a pool ladder;
4. Encumber the user in the swimming exercise; and
5. Require the lifting of a heavy bag or other type of anchor.
OBJECTS AND ADVANTAGES
Accordingly, several objects and advantages of the present invention are:
1. To provide sufficient elastic extension of the harness in order to allow
the swimmer to gauge his or her level of exertion;
2. To eliminate the need for permanent anchor points in the pool;
3. To eliminate the need for a pool ladder;
4. To not encumber the user in the swimming exercise; and
5. To eliminate the need for an inordinately heavy anchor.
DRAWING FIGURES
FIG. 1 is an isometric view, showing the proposed invention in a swimming
pool.
FIG. 2 is a close-up view of the flex bow shown in FIG. 1.
FIG. 3 is a close-up view of the attachment point on the flex bow.
FIG. 4 is a close up view of the belt harness;
FIG. 5 is an isometric view of the anchor frame.
FIG. 6 is an isometric view of the anchor frame with a cooler in place for
added weight.
REFERENCE NUMERALS IN DRAWINGS
10 pool 12 ladder
14 upright leg 16 belt harness
18 flex bow 20 flexible line
22 anchor frame 24 anchor leg
26 anchor runner 28 pool side
30 attach point 32 collector ring
34 line clip 36 belt
38 adjustment clasp 40 trailing flap
42 VELCRO panel 44 VELCRO harness attach
46 trailing line 48 harness union
50 harness leader 52 harness clip
54 stop leg 56 cooler
58 pool apron 60 anchor platform
DESCRIPTION OF THE INVENTION
FIG. 1 depicts a conventional pool 10, having ladder 12 attached to its
side. Ladder 12 has two upright legs 14, standing a small distance off of
pool side 28. In one embodiment, the present invention utilizes ladder 12
to anchor an exercising swimmer in place.
Flex bow 18 is placed between pool side 28 and upright legs 14. Flex bow 18
is typically oriented horizontally, as shown. Flex bow 18 is in the form
of an elastically deformable elongated rod. It has attach points 30 at
either end. When force is placed on attach points 30, flex bow 18 will bow
in the same fashion as an archer's bow; i.e., it will store energy by
elastically deflecting. When force is removed from flex bow 18, it resumes
its straight resting position.
Two flexible lines 20 are attached to flex bow 18, one at either end. Belt
harness 16 is provided for attachment to the swimmer. Belt harness 16
includes harness leader 50, which joins belt harness 16 to the two
flexible lines 20. In the configuration shown, the swimmer would have belt
harness 16 cinched tightly about his or her waist, and would be performing
a swimming stroke--such as the breast stroke or free-style. The reader
will appreciate that as the swimmer attempts to swim away from ladder 12,
the force produced by the swimmer is transmitted to belt harness 16,
through harness leader 50, and on to flexible lines 20. Flexible lines 20,
in turn, pull flex bow 18 against upright legs 14 and begin to bow flex
bow 18. The swimmer is thus restrained.
However, the reader should appreciate that while restrained, the swimmer
can make some forward progress due to the deflection of flex bow 18. The
harder the swimmer strokes, the more deflection results in flex bow 18.
Consequently, the more tension is placed on harness leader 50. It is this
energy storage mechanism that provides the swimmer with feedback on how
much he or she is exerting. It is true that a purely static line will also
increase in tension as the swimmer increases his or her exertion. However,
the use of an energy storage device such as flex bow 18 actually allows
the swimmer to move forward, and this has been found to provide much
better feedback.
FIG. 2 depicts flex bow 18 and flexible lines 20 in greater detail.
Flexible lines 20 are joined by collector ring 32, which provided an
attaching point for harness leader 50. FIG. 3 shows attach point 30 in
more detail. Attach point 30 is permanently attached to the end of flex
bow 18. The reader will observe that it has a ring structure ideal for
attaching clips and the like.
Flexible line 20 terminates in line clip 34. Line clip 34 may be easily
attached or removed from attachment point 30. This feature allows the user
to slip flex bow 18 behind ladder 12, and then attach flexible lines 20.
Flex bow 18 is generally held in place by the fact that it floats on the
surface of the water. It may optionally be attached to ladder 12 by using
bungee cords or the like.
FIG. 4 shows more features of belt harness 16. Belt 36 is configured to
pass around the swimmer's waist. Two adjustment clasps 38 are provided so
that the circumference of belt 36 can be altered to fit a wide variation
in waist sizes. An adjustment on each side of belt 36 is needed to ensure
the symmetry of the harness attachment points.
Two trailing flaps 40 are provided, typically being formed integrally with
the material of belt 36. Each trailing flap 40 has a large VELCRO panel
42. This is provided for attachment to the balance of the harness
assembly, as will be explained shortly. In the illustrated orientation,
belt 36 would be used for performing a swimming stroke in which the
swimmer's body is horizontal, with the chest facing either up or down. For
a side stroke, belt 36 would be rotated through 90 degrees. Those skilled
in the art will appreciate that the harness illustrated easily allows the
swimmer's body to rotate while performing a number of different swimming
strokes.
Some water exercises also require the swimmer to stand upright--such as
walking or running in the pool. Additional VELCRO attachment points can be
provided around belt 36 to accommodate this option. Alternatively, the
user can simply rotate belt 36 90 degrees around the body. By doing so,
trailing flaps 40 are rotated so that they are proximate the user's hips.
Two trailing lines 46 are joined in harness union 48. Each trailing line 46
terminates in a VELCRO harness attach 44. VELCRO harness attaches 44 are
configured to attach to VELCRO panels 42 on trailing flaps 40, thus
linking belt 36 to harness union 48.
Harness leader 50 emerges from the other side of harness union 48. It
reaches for several feet, giving the swimmer ample clearance from ladder
12. Harness leader 50 terminates in harness clip 52, which removably
attaches harness leader 50 to collector ring 32. Thus, the reader will
appreciate that the disclosed apparatus attaches the swimmer to flex bow
18, which is held in place by ladder 12. This is the preferred embodiment
of the invention.
Of course, not all pools are equipped with a ladder. It is therefore
necessary to have an alternate method of anchoring the apparatus. FIG. 5
discloses one such alternate apparatus. Anchor frame 22 is provided for
the attachment of flex bow 18. Anchor frame 22 has two anchor legs 24
extending downward into pool 10. It also has two anchor runners 26,
extending along pool apron 58. At the point furthest from pool 10. Anchor
frame 22 has two upright stop legs 54. Anchor frame 22 can be made from
many different materials.
The particular embodiment illustrated is made from 2 inch PVC piping. The
pipe may be joined together using pipe cement and PVC elbows. However, it
is also possible to omit the pipe cement. PVC segments are typically
slip-fit into each other. There is sufficient friction in the slip fit to
avoid the need for using pipe cement. Thus, anchor frame 22 may be
employed without cementing the pieces together. This embodiment has the
added benefit of portability. Once the user is finished with anchor frame
22, he or she can quickly disassemble the components and place them in a
storage bag. The disassembled version is obviously much more convenient to
transport and store.
Turning now to FIG. 6, the use of anchor frame 22 will be explained. Anchor
frame 22 is placed on the side of pool 10 as shown. Flex bow 18 is placed
between anchor legs 24 and pool side 28, in much the same fashion as with
ladder 12. The remainder of the swimmer harnessing apparatus is identical
to the previous disclosure. The reader will readily appreciate, however,
that the swimmer would easily drag anchor frame 22 into the pool unless it
is held in place by significant weight. It is therefore necessary to place
weight on anchor frame 22 to lock anchor runners 26 against pool apron 58.
Many different objects could be used for weight. In this particular
illustration, cooler 56 has been used--since coolers are often found near
pools. Two stop legs 54 are provided to bear against cooler 56, or other
objects used.
Turning back to FIG. 5, anchor platform 60 is provided to evenly distribute
the load of an object placed on anchor frame 22. Using anchor frame 60, it
is also easy and convenient for a second person to stand upon anchor frame
22 in order to hold it in place. This option is particularly suited to a
coaching situation where a swimming coach wishes to observe the technique
of a student.
Those skilled in the art will realize that many types of objects can be
used to hold anchor frame 22 in place. Thus, anchor frame 22 allows the
invention to be used in virtually any type of pool. No particular anchor
point or fixture within the pool is needed. In addition, anchor frame 22
also allows the device to be used on a dock, such as would commonly be
found in a river or pond. The device may also be used on certain types of
boats.
Returning now to FIGS. 1 through 3, the particular materials used in the
construction of the components will be discussed. The material selected
for flex bow 18 is obviously important. It must be capable of repeatedly
flexing without undergoing plastic deformation. It must also be capable of
withstanding pool chemicals. Many types of flex bows are presently in
use--such as those found on strength training equipment. These are
suitable for use in the present situation. A hollow PVC tube has also been
found to be satisfactory. A thick-walled schedule of PVC tubing is
preferable, in order to prevent buckling. This PVC tube is capable of
deflecting significantly without buckling, thereby allowing the swimmer to
advance a significant distance before reaching the point where he or she
can stretch the system no further.
Flexible lines 20 can be made of elastic or inelastic materials. Making
this component from an elastic material, such as rubber tubing, allows the
entire system to stretch even further. The same can be said of harness
leader 50. If it is made of an elastic material as well, the system can
stretch even further.
Belt 36 must be comfortable for the swimmer to wear, yet still be capable
of transmitting significant loads. Nylon webbing has been found suitable
for this component. Several molded plastic components are utilized. These
are: harness union 48, harness clip 50, collector ring 30, and line clips
34. Many different types of molding plastics may be used for these
components. However, it should be kept in mind that the material must be
capable of withstanding prolonged exposure to sunlight, it must be capable
of withstanding prolonged exposure to pool chemicals, and it must resist
excessive water absorption.
Summary, Ramifications, and Scope
Accordingly, the reader will appreciate that the proposed invention allows
a swimmer to exercise within a pool without moving significantly, yet
still allows the swimmer to gauge his or her level of exertion. The
invention has further advantages in that it:
1. Eliminates the need for permanent anchor points in the pool;
2. Eliminates the need for a pool ladder;
3. Does not encumber the user in the swimming exercise; and
4. Eliminates the need for an inordinately heavy anchor.
Although the preceding description contains significant detail, it should
not be construed as limiting the scope of the invention but rather as
providing illustrations of the preferred embodiments of the invention. For
example, many different types of attaching devices could be substituted
for line clips 34 and harness clip 50, different attachment devices could
be substituted for VELCRO panels 42, etc. Thus, the scope of the invention
should be fixed by the following claims, rather than by the examples
given.
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